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    <title>自定义日历控件(继承系统控件实现) – Yang Blog</title>
    


  
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      <span>自定义日历控件(继承系统控件实现)</span>
    
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    <h2 class="single__title" data-ani="true">自定义日历控件(继承系统控件实现)</h2>
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  <time class="single__info" title="Written At">📅&nbsp;Jan 1, 0001 </time>
  
  &nbsp;&middot;&nbsp; <span class="single__info" title="Reading Time"> ☕&nbsp;3&nbsp;min read </span>
  
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      <p><strong>Android自定义日历控件(继承系统控件实现)</strong></p>
<p><img src="http://image.youcute.cn/17-5-28/51509146.jpg" alt="" /></p>
<blockquote>
<p>主要步骤</p>
</blockquote>
<ol>
<li>编写布局</li>
<li>继承LinearLayout设置子控件</li>
<li>设置数据</li>
<li>继承TextView实现有圆圈背景的TextView</li>
<li>添加Attribute</li>
<li>添加长按事件</li>
</ol>
<h2 id="1编写布局">1.编写布局</h2>
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<td class="lntd">
<pre class="chroma"><code class="language-xml" data-lang="xml"><span class="cp">&lt;?xml version=&#34;1.0&#34; encoding=&#34;utf-8&#34;?&gt;</span>
<span class="nt">&lt;LinearLayout</span> <span class="na">xmlns:android=</span><span class="s">&#34;http://schemas.android.com/apk/res/android&#34;</span>
    <span class="na">android:layout_width=</span><span class="s">&#34;match_parent&#34;</span>
    <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
    <span class="na">android:orientation=</span><span class="s">&#34;vertical&#34;</span><span class="nt">&gt;</span>

    <span class="nt">&lt;RelativeLayout</span>
        <span class="na">android:id=</span><span class="s">&#34;@+id/header&#34;</span>
        <span class="na">android:layout_width=</span><span class="s">&#34;match_parent&#34;</span>
        <span class="na">android:layout_height=</span><span class="s">&#34;30dp&#34;</span><span class="nt">&gt;</span>

        <span class="nt">&lt;ImageView</span>
            <span class="na">android:id=</span><span class="s">&#34;@+id/btn_pre&#34;</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;30dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;30dp&#34;</span>
            <span class="na">android:layout_alignParentLeft=</span><span class="s">&#34;true&#34;</span>
            <span class="na">android:layout_alignParentStart=</span><span class="s">&#34;true&#34;</span>
            <span class="na">android:src=</span><span class="s">&#34;@mipmap/ic_launcher&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;ImageView</span>
            <span class="na">android:id=</span><span class="s">&#34;@+id/btn_next&#34;</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;30dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;30dp&#34;</span>
            <span class="na">android:layout_alignParentEnd=</span><span class="s">&#34;true&#34;</span>
            <span class="na">android:layout_alignParentRight=</span><span class="s">&#34;true&#34;</span>
            <span class="na">android:src=</span><span class="s">&#34;@mipmap/ic_launcher&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:id=</span><span class="s">&#34;@+id/txtData&#34;</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;wrap_content&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_centerInParent=</span><span class="s">&#34;true&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;@string/app_name&#34;</span> <span class="nt">/&gt;</span>

    <span class="nt">&lt;/RelativeLayout&gt;</span>

    <span class="nt">&lt;LinearLayout</span>
        <span class="na">android:id=</span><span class="s">&#34;@+id/week_header&#34;</span>
        <span class="na">android:layout_width=</span><span class="s">&#34;match_parent&#34;</span>
        <span class="na">android:layout_height=</span><span class="s">&#34;40dp&#34;</span>
        <span class="na">android:orientation=</span><span class="s">&#34;horizontal&#34;</span><span class="nt">&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;1&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;2&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;3&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;4&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;5&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;6&#34;</span> <span class="nt">/&gt;</span>

        <span class="nt">&lt;TextView</span>
            <span class="na">android:layout_width=</span><span class="s">&#34;0dp&#34;</span>
            <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
            <span class="na">android:layout_weight=</span><span class="s">&#34;1&#34;</span>
            <span class="na">android:gravity=</span><span class="s">&#34;center&#34;</span>
            <span class="na">android:text=</span><span class="s">&#34;7&#34;</span> <span class="nt">/&gt;</span>
    <span class="nt">&lt;/LinearLayout&gt;</span>

    <span class="nt">&lt;GridView</span>
        <span class="na">android:id=</span><span class="s">&#34;@+id/grid&#34;</span>
        <span class="na">android:layout_width=</span><span class="s">&#34;match_parent&#34;</span>
        <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
        <span class="na">android:numColumns=</span><span class="s">&#34;7&#34;</span> <span class="nt">/&gt;</span>

<span class="nt">&lt;/LinearLayout&gt;</span>
</code></pre></td></tr></table>
</div>
</div><h2 id="2继承linearlayout设置子控件">2.继承LinearLayout设置子控件</h2>
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<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"><span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalendarView</span> <span class="kd">extends</span> <span class="n">LinearLayout</span> <span class="o">{</span>
    <span class="kd">private</span> <span class="n">ImageView</span> <span class="n">btnPre</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">ImageView</span> <span class="n">btnNext</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">TextView</span> <span class="n">txtData</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">GridView</span> <span class="n">gridView</span><span class="o">;</span>
    <span class="kd">private</span> <span class="n">Calendar</span> <span class="n">calendar</span> <span class="o">=</span> <span class="n">Calendar</span><span class="o">.</span><span class="na">getInstance</span><span class="o">();</span>
    <span class="kd">private</span> <span class="n">String</span> <span class="n">displayFormat</span><span class="o">;</span>
    <span class="kd">public</span> <span class="n">NewViewListener</span> <span class="n">viewListener</span><span class="o">;</span>

    <span class="kd">public</span> <span class="kt">void</span> <span class="nf">setViewListener</span><span class="o">(</span><span class="n">NewViewListener</span> <span class="n">viewListener</span><span class="o">)</span> <span class="o">{</span>
        <span class="k">this</span><span class="o">.</span><span class="na">viewListener</span> <span class="o">=</span> <span class="n">viewListener</span><span class="o">;</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="nd">@Nullable</span> <span class="n">AttributeSet</span> <span class="n">attrs</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">);</span>
        <span class="n">initControl</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="nd">@Nullable</span> <span class="n">AttributeSet</span> <span class="n">attrs</span><span class="o">,</span> <span class="kt">int</span> <span class="n">defStyleAttr</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">,</span> <span class="n">defStyleAttr</span><span class="o">);</span>
        <span class="n">initControl</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="kd">private</span> <span class="kt">void</span> <span class="nf">initControl</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="n">AttributeSet</span> <span class="n">attributeSet</span><span class="o">)</span> <span class="o">{</span>
        <span class="n">bindControl</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
        <span class="n">bindControlEvent</span><span class="o">();</span>
        <span class="n">setAttribute</span><span class="o">(</span><span class="n">attributeSet</span><span class="o">);</span>
        <span class="n">renderCalender</span><span class="o">();</span>
    <span class="o">}</span>

    <span class="kd">private</span> <span class="kt">void</span> <span class="nf">bindControl</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
        <span class="n">LayoutInflater</span><span class="o">.</span><span class="na">from</span><span class="o">(</span><span class="n">context</span><span class="o">).</span><span class="na">inflate</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">layout</span><span class="o">.</span><span class="na">new_view</span><span class="o">,</span> <span class="k">this</span><span class="o">);</span>
        <span class="n">btnNext</span> <span class="o">=</span> <span class="o">(</span><span class="n">ImageView</span><span class="o">)</span> <span class="n">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">btn_next</span><span class="o">);</span>
        <span class="n">btnPre</span> <span class="o">=</span> <span class="o">(</span><span class="n">ImageView</span><span class="o">)</span> <span class="n">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">btn_pre</span><span class="o">);</span>
        <span class="n">txtData</span> <span class="o">=</span> <span class="o">(</span><span class="n">TextView</span><span class="o">)</span> <span class="n">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">txtData</span><span class="o">);</span>
        <span class="n">gridView</span> <span class="o">=</span> <span class="o">(</span><span class="n">GridView</span><span class="o">)</span> <span class="n">findViewById</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">id</span><span class="o">.</span><span class="na">grid</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="kd">private</span> <span class="kt">void</span> <span class="nf">bindControlEvent</span><span class="o">()</span> <span class="o">{</span>
        <span class="n">btnNext</span><span class="o">.</span><span class="na">setOnClickListener</span><span class="o">(</span><span class="k">new</span> <span class="n">OnClickListener</span><span class="o">()</span> <span class="o">{</span>
            <span class="nd">@Override</span>
            <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onClick</span><span class="o">(</span><span class="n">View</span> <span class="n">v</span><span class="o">)</span> <span class="o">{</span>
                <span class="n">calendar</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">MONTH</span><span class="o">,</span> <span class="o">+</span><span class="n">1</span><span class="o">);</span>
                <span class="n">renderCalender</span><span class="o">();</span>
            <span class="o">}</span>
        <span class="o">});</span>
        <span class="n">btnPre</span><span class="o">.</span><span class="na">setOnClickListener</span><span class="o">(</span><span class="k">new</span> <span class="n">OnClickListener</span><span class="o">()</span> <span class="o">{</span>
            <span class="nd">@Override</span>
            <span class="kd">public</span> <span class="kt">void</span> <span class="nf">onClick</span><span class="o">(</span><span class="n">View</span> <span class="n">v</span><span class="o">)</span> <span class="o">{</span>
                <span class="n">calendar</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">MONTH</span><span class="o">,</span> <span class="o">-</span><span class="n">1</span><span class="o">);</span>
                <span class="n">renderCalender</span><span class="o">();</span>
            <span class="o">}</span>
        <span class="o">});</span>
    <span class="o">}</span>
 <span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h2 id="3设置数据">3.设置数据</h2>
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<pre class="chroma"><code class="language-java" data-lang="java"><span class="kd">private</span> <span class="kt">void</span> <span class="nf">renderCalender</span><span class="o">()</span> <span class="o">{</span>

        <span class="c1">//返回&#34;月+日&#34;格式的数据
</span><span class="c1"></span>        <span class="n">SimpleDateFormat</span> <span class="n">sdf</span> <span class="o">=</span> <span class="k">new</span> <span class="n">SimpleDateFormat</span><span class="o">(</span><span class="n">displayFormat</span><span class="o">,</span> <span class="n">Locale</span><span class="o">.</span><span class="na">CHINA</span><span class="o">);</span>
        <span class="n">txtData</span><span class="o">.</span><span class="na">setText</span><span class="o">(</span><span class="n">sdf</span><span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="n">calendar</span><span class="o">.</span><span class="na">getTime</span><span class="o">()));</span>

        <span class="n">ArrayList</span><span class="o">&lt;</span><span class="n">Date</span><span class="o">&gt;</span> <span class="n">cells</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ArrayList</span><span class="o">&lt;&gt;();</span>

        <span class="n">Calendar</span> <span class="n">calendar2</span> <span class="o">=</span> <span class="o">(</span><span class="n">Calendar</span><span class="o">)</span> <span class="k">this</span><span class="o">.</span><span class="na">calendar</span><span class="o">.</span><span class="na">clone</span><span class="o">();</span>
        <span class="c1">//设置月的第一天为1
</span><span class="c1"></span>        <span class="n">calendar2</span><span class="o">.</span><span class="na">set</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">DAY_OF_MONTH</span><span class="o">,</span> <span class="n">1</span><span class="o">);</span>

        <span class="c1">//获取当前周数的前一天
</span><span class="c1"></span>        <span class="kt">int</span> <span class="n">prevDays</span> <span class="o">=</span> <span class="n">calendar2</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">DAY_OF_WEEK</span><span class="o">)</span> <span class="o">-</span> <span class="n">1</span><span class="o">;</span>
        <span class="c1">//运算日历加上加前一周
</span><span class="c1"></span>        <span class="n">calendar2</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">DAY_OF_MONTH</span><span class="o">,</span> <span class="o">-</span><span class="n">prevDays</span><span class="o">);</span>

        <span class="kt">int</span> <span class="n">maxCellCount</span> <span class="o">=</span> <span class="n">6</span> <span class="o">*</span> <span class="n">7</span><span class="o">;</span>

        <span class="c1">//将日历里的日期数据添加到ArrayList
</span><span class="c1"></span>        <span class="k">while</span> <span class="o">(</span><span class="n">cells</span><span class="o">.</span><span class="na">size</span><span class="o">()</span> <span class="o">&lt;</span> <span class="n">maxCellCount</span><span class="o">)</span> <span class="o">{</span>
            <span class="n">cells</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">calendar2</span><span class="o">.</span><span class="na">getTime</span><span class="o">());</span>
            <span class="n">calendar2</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">Calendar</span><span class="o">.</span><span class="na">DAY_OF_MONTH</span><span class="o">,</span> <span class="n">1</span><span class="o">);</span>
        <span class="o">}</span>

        <span class="n">gridView</span><span class="o">.</span><span class="na">setAdapter</span><span class="o">(</span><span class="k">new</span> <span class="n">MyAdapter</span><span class="o">(</span><span class="n">getContext</span><span class="o">(),</span> <span class="n">cells</span><span class="o">));</span>
        <span class="n">gridView</span><span class="o">.</span><span class="na">setOnItemLongClickListener</span><span class="o">(</span><span class="k">new</span> <span class="n">AdapterView</span><span class="o">.</span><span class="na">OnItemLongClickListener</span><span class="o">()</span> <span class="o">{</span>
            <span class="nd">@Override</span>
            <span class="kd">public</span> <span class="kt">boolean</span> <span class="nf">onItemLongClick</span><span class="o">(</span><span class="n">AdapterView</span><span class="o">&lt;?&gt;</span> <span class="n">parent</span><span class="o">,</span> <span class="n">View</span> <span class="n">view</span><span class="o">,</span> <span class="kt">int</span> <span class="n">position</span><span class="o">,</span> <span class="kt">long</span> <span class="n">id</span><span class="o">)</span> <span class="o">{</span>
                <span class="k">if</span> <span class="o">(</span><span class="n">viewListener</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
                    <span class="k">return</span> <span class="kc">false</span><span class="o">;</span>
                <span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
                    <span class="n">viewListener</span><span class="o">.</span><span class="na">onItemLongPress</span><span class="o">((</span><span class="n">Date</span><span class="o">)</span> <span class="n">parent</span><span class="o">.</span><span class="na">getItemAtPosition</span><span class="o">(</span><span class="n">position</span><span class="o">));</span>
                    <span class="k">return</span> <span class="kc">true</span><span class="o">;</span>
                <span class="o">}</span>
            <span class="o">}</span>
        <span class="o">});</span>
    <span class="o">}</span>

    <span class="kd">private</span> <span class="kd">class</span> <span class="nc">MyAdapter</span> <span class="kd">extends</span> <span class="n">ArrayAdapter</span><span class="o">&lt;</span><span class="n">Date</span><span class="o">&gt;</span> <span class="o">{</span>

        <span class="n">LayoutInflater</span> <span class="n">layoutInflater</span><span class="o">;</span>

        <span class="n">MyAdapter</span><span class="o">(</span><span class="nd">@NonNull</span> <span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="n">ArrayList</span><span class="o">&lt;</span><span class="n">Date</span><span class="o">&gt;</span> <span class="n">dates</span><span class="o">)</span> <span class="o">{</span>
            <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">R</span><span class="o">.</span><span class="na">layout</span><span class="o">.</span><span class="na">calendar_text_day</span><span class="o">,</span> <span class="n">dates</span><span class="o">);</span>
            <span class="n">layoutInflater</span> <span class="o">=</span> <span class="n">LayoutInflater</span><span class="o">.</span><span class="na">from</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
        <span class="o">}</span>

        <span class="nd">@NonNull</span>
        <span class="nd">@Override</span>
        <span class="kd">public</span> <span class="n">View</span> <span class="nf">getView</span><span class="o">(</span><span class="kt">int</span> <span class="n">position</span><span class="o">,</span> <span class="nd">@Nullable</span> <span class="n">View</span> <span class="n">convertView</span><span class="o">,</span> <span class="nd">@NonNull</span> <span class="n">ViewGroup</span> <span class="n">parent</span><span class="o">)</span> <span class="o">{</span>
            <span class="n">Date</span> <span class="n">date</span> <span class="o">=</span> <span class="n">getItem</span><span class="o">(</span><span class="n">position</span><span class="o">);</span>
            <span class="k">if</span> <span class="o">(</span><span class="n">convertView</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
                <span class="n">convertView</span> <span class="o">=</span> <span class="n">layoutInflater</span><span class="o">.</span><span class="na">inflate</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">layout</span><span class="o">.</span><span class="na">calendar_text_day</span><span class="o">,</span> <span class="n">parent</span><span class="o">,</span> <span class="kc">false</span><span class="o">);</span>
            <span class="o">}</span>
            <span class="kt">int</span> <span class="n">day</span> <span class="o">=</span> <span class="n">date</span><span class="o">.</span><span class="na">getDate</span><span class="o">();</span>
            <span class="o">((</span><span class="n">CalendarTextView</span><span class="o">)</span> <span class="n">convertView</span><span class="o">).</span><span class="na">setText</span><span class="o">(</span><span class="n">String</span><span class="o">.</span><span class="na">valueOf</span><span class="o">(</span><span class="n">day</span><span class="o">));</span>
            <span class="n">Date</span> <span class="n">now</span> <span class="o">=</span> <span class="k">new</span> <span class="n">Date</span><span class="o">();</span>

            <span class="kt">boolean</span> <span class="n">isSameMonth</span> <span class="o">=</span> <span class="kc">false</span><span class="o">;</span>
            <span class="k">if</span> <span class="o">(</span><span class="n">date</span><span class="o">.</span><span class="na">getMonth</span><span class="o">()</span> <span class="o">==</span> <span class="n">now</span><span class="o">.</span><span class="na">getMonth</span><span class="o">())</span> <span class="o">{</span>
                <span class="n">isSameMonth</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
            <span class="o">}</span>

            <span class="k">if</span> <span class="o">(</span><span class="n">isSameMonth</span><span class="o">)</span> <span class="o">{</span>
                <span class="o">((</span><span class="n">CalendarTextView</span><span class="o">)</span> <span class="n">convertView</span><span class="o">).</span><span class="na">setTextColor</span><span class="o">(</span><span class="n">Color</span><span class="o">.</span><span class="na">DKGRAY</span><span class="o">);</span>
            <span class="o">}</span>

            <span class="k">if</span> <span class="o">(</span><span class="n">now</span><span class="o">.</span><span class="na">getDate</span><span class="o">()</span> <span class="o">==</span> <span class="n">date</span><span class="o">.</span><span class="na">getDate</span><span class="o">()</span> <span class="o">&amp;&amp;</span> <span class="n">now</span><span class="o">.</span><span class="na">getMonth</span><span class="o">()</span> <span class="o">==</span> <span class="n">date</span><span class="o">.</span><span class="na">getMonth</span><span class="o">()</span> <span class="o">&amp;&amp;</span> <span class="n">now</span><span class="o">.</span><span class="na">getYear</span><span class="o">()</span> <span class="o">==</span> <span class="n">date</span><span class="o">.</span><span class="na">getYear</span><span class="o">())</span> <span class="o">{</span>
                <span class="o">((</span><span class="n">CalendarTextView</span><span class="o">)</span> <span class="n">convertView</span><span class="o">).</span><span class="na">setNow</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
            <span class="o">}</span>
            <span class="k">return</span> <span class="n">convertView</span><span class="o">;</span>
        <span class="o">}</span>
    <span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h2 id="4-圆圈背景textview">4. 圆圈背景TextView</h2>
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<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"><span class="kd">public</span> <span class="kd">class</span> <span class="nc">CalendarTextView</span> <span class="kd">extends</span> <span class="n">AppCompatTextView</span> <span class="o">{</span>
    <span class="kd">private</span> <span class="n">Paint</span> <span class="n">paint</span><span class="o">;</span>
    <span class="kd">private</span> <span class="kt">boolean</span> <span class="n">isNow</span> <span class="o">=</span> <span class="kc">false</span><span class="o">;</span>

    <span class="kd">public</span> <span class="kt">void</span> <span class="nf">setNow</span><span class="o">(</span><span class="kt">boolean</span> <span class="n">now</span><span class="o">)</span> <span class="o">{</span>
        <span class="n">isNow</span> <span class="o">=</span> <span class="n">now</span><span class="o">;</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarTextView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarTextView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="nd">@Nullable</span> <span class="n">AttributeSet</span> <span class="n">attrs</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">);</span>
        <span class="n">initControl</span><span class="o">();</span>
    <span class="o">}</span>

    <span class="kd">public</span> <span class="nf">CalendarTextView</span><span class="o">(</span><span class="n">Context</span> <span class="n">context</span><span class="o">,</span> <span class="nd">@Nullable</span> <span class="n">AttributeSet</span> <span class="n">attrs</span><span class="o">,</span> <span class="kt">int</span> <span class="n">defStyleAttr</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">(</span><span class="n">context</span><span class="o">,</span> <span class="n">attrs</span><span class="o">,</span> <span class="n">defStyleAttr</span><span class="o">);</span>
        <span class="n">initControl</span><span class="o">();</span>
    <span class="o">}</span>


    <span class="kd">private</span> <span class="kt">void</span> <span class="nf">initControl</span><span class="o">()</span> <span class="o">{</span>
        <span class="n">paint</span> <span class="o">=</span> <span class="k">new</span> <span class="n">Paint</span><span class="o">();</span>
        <span class="n">paint</span><span class="o">.</span><span class="na">setStyle</span><span class="o">(</span><span class="n">Paint</span><span class="o">.</span><span class="na">Style</span><span class="o">.</span><span class="na">STROKE</span><span class="o">);</span>
        <span class="n">paint</span><span class="o">.</span><span class="na">setColor</span><span class="o">(</span><span class="n">Color</span><span class="o">.</span><span class="na">RED</span><span class="o">);</span>
        <span class="n">paint</span><span class="o">.</span><span class="na">setStrokeWidth</span><span class="o">(</span><span class="n">2</span><span class="o">);</span>
    <span class="o">}</span>

    <span class="nd">@Override</span>
    <span class="kd">protected</span> <span class="kt">void</span> <span class="nf">onDraw</span><span class="o">(</span><span class="n">Canvas</span> <span class="n">canvas</span><span class="o">)</span> <span class="o">{</span>
        <span class="kd">super</span><span class="o">.</span><span class="na">onDraw</span><span class="o">(</span><span class="n">canvas</span><span class="o">);</span>
        <span class="k">if</span> <span class="o">(</span><span class="n">isNow</span><span class="o">)</span> <span class="o">{</span>
            <span class="n">canvas</span><span class="o">.</span><span class="na">translate</span><span class="o">(</span><span class="n">getWidth</span><span class="o">()</span> <span class="o">/</span> <span class="n">2</span><span class="o">,</span> <span class="n">getHeight</span><span class="o">()</span> <span class="o">/</span> <span class="n">2</span><span class="o">);</span>
            <span class="n">canvas</span><span class="o">.</span><span class="na">drawCircle</span><span class="o">(</span><span class="n">0</span><span class="o">,</span> <span class="n">0</span><span class="o">,</span> <span class="n">getWidth</span><span class="o">()</span> <span class="o">/</span> <span class="n">2</span><span class="o">,</span> <span class="n">paint</span><span class="o">);</span>
            <span class="n">setTextColor</span><span class="o">(</span><span class="n">Color</span><span class="o">.</span><span class="na">RED</span><span class="o">);</span>
        <span class="o">}</span>
    <span class="o">}</span>
<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div><h2 id="5添加attribute">5.添加Attribute</h2>
<ol>
<li>
<p>添加attrs文件</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre class="chroma"><code><span class="lnt">1
</span><span class="lnt">2
</span><span class="lnt">3
</span><span class="lnt">4
</span><span class="lnt">5
</span><span class="lnt">6
</span></code></pre></td>
<td class="lntd">
<pre class="chroma"><code class="language-xml" data-lang="xml"><span class="cp">&lt;?xml version=&#34;1.0&#34; encoding=&#34;utf-8&#34;?&gt;</span>
<span class="nt">&lt;resources&gt;</span>
    <span class="nt">&lt;declare-styleable</span> <span class="na">name=</span><span class="s">&#34;CalendarView&#34;</span><span class="nt">&gt;</span>
        <span class="nt">&lt;attr</span> <span class="na">name=</span><span class="s">&#34;dateFormat&#34;</span> <span class="na">format=</span><span class="s">&#34;string&#34;</span> <span class="nt">/&gt;</span>
    <span class="nt">&lt;/declare-styleable&gt;</span>
<span class="nt">&lt;/resources&gt;</span>
</code></pre></td></tr></table>
</div>
</div></li>
<li>
<p>将Arrtibute参数设置到控件</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre class="chroma"><code><span class="lnt"> 1
</span><span class="lnt"> 2
</span><span class="lnt"> 3
</span><span class="lnt"> 4
</span><span class="lnt"> 5
</span><span class="lnt"> 6
</span><span class="lnt"> 7
</span><span class="lnt"> 8
</span><span class="lnt"> 9
</span><span class="lnt">10
</span><span class="lnt">11
</span></code></pre></td>
<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"><span class="kd">private</span> <span class="kt">void</span> <span class="nf">setAttribute</span><span class="o">(</span><span class="n">AttributeSet</span> <span class="n">attributeSet</span><span class="o">)</span> <span class="o">{</span>
    <span class="n">TypedArray</span> <span class="n">ta</span> <span class="o">=</span> <span class="n">getContext</span><span class="o">().</span><span class="na">obtainStyledAttributes</span><span class="o">(</span><span class="n">attributeSet</span><span class="o">,</span> <span class="n">R</span><span class="o">.</span><span class="na">styleable</span><span class="o">.</span><span class="na">CalendarView</span><span class="o">);</span>
    <span class="k">try</span> <span class="o">{</span>
        <span class="n">displayFormat</span> <span class="o">=</span> <span class="n">ta</span><span class="o">.</span><span class="na">getString</span><span class="o">(</span><span class="n">R</span><span class="o">.</span><span class="na">styleable</span><span class="o">.</span><span class="na">CalendarView_dateFormat</span><span class="o">);</span>
        <span class="k">if</span> <span class="o">(</span><span class="n">displayFormat</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> <span class="o">{</span>
            <span class="n">displayFormat</span> <span class="o">=</span> <span class="s">&#34;MMM yyy&#34;</span><span class="o">;</span>
        <span class="o">}</span>
    <span class="o">}</span> <span class="k">finally</span> <span class="o">{</span>
        <span class="n">ta</span><span class="o">.</span><span class="na">recycle</span><span class="o">();</span>
    <span class="o">}</span>
<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div></li>
<li>
<p>在布局中加入命名控件引入</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre class="chroma"><code><span class="lnt">1
</span><span class="lnt">2
</span><span class="lnt">3
</span><span class="lnt">4
</span><span class="lnt">5
</span><span class="lnt">6
</span></code></pre></td>
<td class="lntd">
<pre class="chroma"><code class="language-xml" data-lang="xml"><span class="nt">&lt;com.example.jiyang.newview.CalendarView</span> <span class="na">xmlns:CalendarView=</span><span class="s">&#34;http://schemas.android.com/apk/res/com.example.jiyang.newview&#34;</span>
    <span class="na">android:id=</span><span class="s">&#34;@+id/newView&#34;</span>
    <span class="na">android:layout_width=</span><span class="s">&#34;match_parent&#34;</span>
    <span class="na">android:layout_height=</span><span class="s">&#34;match_parent&#34;</span>
    <span class="na">android:padding=</span><span class="s">&#34;10dp&#34;</span>
    <span class="na">CalendarView:dateFormat=</span><span class="s">&#34;MMMM yyyy&#34;</span> <span class="nt">/&gt;</span>
</code></pre></td></tr></table>
</div>
</div></li>
</ol>
<h2 id="6添加长按事件">6.添加长按事件</h2>
<ol>
<li>
<p>定义长按接口</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre class="chroma"><code><span class="lnt">1
</span><span class="lnt">2
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<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"><span class="kd">public</span> <span class="kd">interface</span> <span class="nc">NewViewListener</span> <span class="o">{</span>
    <span class="kt">void</span> <span class="nf">onItemLongPress</span><span class="o">(</span><span class="n">Date</span> <span class="n">day</span><span class="o">);</span>
<span class="o">}</span>
</code></pre></td></tr></table>
</div>
</div></li>
<li>
<p>CalenderView中调用</p>
<div class="highlight"><div class="chroma">
<table class="lntable"><tr><td class="lntd">
<pre class="chroma"><code></code></pre></td>
<td class="lntd">
<pre class="chroma"><code class="language-java" data-lang="java"></code></pre></td></tr></table>
</div>
</div></li>
</ol>
<p>gridView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {<br />
@Override<br />
public boolean onItemLongClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {<br />
if (viewListener == null) {<br />
return false;<br />
} else {<br />
viewListener.onItemLongPress((Date) parent.getItemAtPosition(position));<br />
return true;<br />
}<br />
}<br />
});<br />
<code>3. Activity中实现接口方法</code>java<br />
@Override<br />
public void onItemLongPress(Date day) {<br />
DateFormat df = SimpleDateFormat.getDateInstance();<br />
Toast.makeText(this, df.format(day), Toast.LENGTH_SHORT).show();<br />
}<br />
```</p>
<h2 id="总结">总结</h2>
<ul>
<li>
<p>Attribute的使用</p>
<ol>
<li>定义attrs文件</li>
<li>注意命名空间。自定义View不能使用<code>app:</code>，而要使用<code>xmlns:</code>自定义一个命名空间</li>
<li>TypedArray放入<code>try{}finaly{}</code>中，要在<code>finally</code>中释放TypedArray <code>typedArray.recycle()</code></li>
</ol>
</li>
<li>
<p>通过继承布局实现自定义View时，加载布局<br />
需要<code>LayoutInflater.from(context).inflate(R.layout.new_view, this);</code>不能<code>LayoutInflater.from(context).inflate(R.layout.new_view, this,false);</code></p>
</li>
</ul>

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        elem.classList.remove('tooltipped-w');
      });
    });

    clip.on('success', function (e) {
      e.clearSelection();
      e.trigger.setAttribute('aria-label', 'Link copied to clipboard!');
      e.trigger.classList.add('tooltipped');
      e.trigger.classList.add('tooltipped-s');
    });
    


    
    var clipInit = false;
    var preChromaElem = document.querySelectorAll('pre.chroma');
    var langCodeElem = document.querySelectorAll('.language-code');
    var dollarCodeElem = document.querySelectorAll('div.language-\\$');
    var gtCodeElem = document.querySelectorAll('div.language-\\>');

    var makeClipboard = function(elem) {
      var code = elem,
        text = elem.textContent;
        
      if (text.length > 15) {
        if (!clipInit) {
          var text, clip = new ClipboardJS('.copy-to-clipboard', {
            text: function (trigger) {
              var codeElem = prev(trigger).querySelectorAll('code');
              if (codeElem.length > 1) {
                text = prev(trigger).querySelector('code[class^="language-"]').textContent;
              } else {
                text = prev(trigger).querySelector('code').textContent;
              }

              return text.replace(/^\$\s/gm, '');
            }
          });

          var inPre;
          clip.on('success', function (e) {
            e.clearSelection();
            inPre = prop(e.trigger.parentNode, 'tagName') == 'PRE';
            e.trigger.setAttribute('aria-label', 'Copied to clipboard!');
            e.trigger.classList.add('tooltipped');
            e.trigger.classList.add('tooltipped-w');
          });

          clip.on('error', function (e) {
            inPre = prop(e.trigger.parentNode, 'tagName') == 'PRE';
            e.trigger.setAttribute('aria-label', e.action.toString());
            e.trigger.classList.add('tooltipped');
            e.trigger.classList.add('tooltipped-w');
          });

          clipInit = true;
        }

        var notAllowedClass = ['language-mermaid', 'language-viz', 'language-wave', 'language-chart', 'language-msc', 'language-flowchart'];
        var isNotAllowedIncluded = false;
        var curClassName = code.getAttribute('class');

        for (var i = 0; i < notAllowedClass.length; i++) {
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            isNotAllowedIncluded = true;
            break;
          }
        }

        if (!isNotAllowedIncluded) {
          if (curClassName) {
            var newClipboardElem = document.createElement('span');
            newClipboardElem.setAttribute('class', 'copy-to-clipboard');
            newClipboardElem.setAttribute('title', 'Copy to clipboard');
            elem.parentNode.parentNode.insertBefore(newClipboardElem, elem.parentNode.nextElementSibling);
          }
        }
      }
    }

    var makeSymbolClipboard = function(elem) {
      var clipboardSpan = document.createElement('span');
      clipboardSpan.setAttribute('class', 'copy-to-clipboard');
      clipboardSpan.setAttribute('title', 'Copy to clipboard');
      elem.parentNode.parentNode.insertBefore(clipboardSpan, elem.parentNode.nextElementSibling);
    }

    preChromaElem ? 
    preChromaElem.forEach(function(elem) {
      elem.querySelectorAll('code').forEach(function(codeElem) {
        makeClipboard(codeElem);
      });
    }) : null;
    
    langCodeElem ? 
    langCodeElem.forEach(function(elem) {
      elem.querySelectorAll('code').forEach(function (codeElem) {
        makeClipboard(codeElem);
      });
    }) : null;

    dollarCodeElem ? 
    dollarCodeElem.forEach(function(elem) {
      elem.querySelectorAll('code').forEach(function (codeElem) {
        makeSymbolClipboard(codeElem);
      });
    }) : null;

    gtCodeElem ?
    gtCodeElem.forEach(function(elem) {
      elem.querySelectorAll('code').forEach(function (codeElem) {
        makeSymbolClipboard(codeElem);
      });
    }) : null;
    


    
    dollarCodeElem ?
    dollarCodeElem.forEach(function(elem) {
      var lnts = elem.parentNode.parentNode ? elem.parentNode.parentNode.querySelectorAll('.lnt') : null;
      lnts ? 
      lnts.forEach(function(lnt) {
        lnt.innerHTML = '$<br/>';
      }) : null;
    }) : null;

    gtCodeElem ?
    gtCodeElem.forEach(function(elem) {
      var lnts = elem.parentNode.parentNode ? elem.parentNode.parentNode.querySelectorAll('.lnt') : null;
      lnts ? 
      lnts.forEach(function(lnt) {
        lnt.innerHTML = '><br/>';
      }) : null;
    }) : null;
    


    
    
    var lib = JSON.parse("null");

    if (lib && lib.includes('mermaid')) {
      
      var themeVariant = localStorage.getItem('theme') || JSON.parse("\"light\"");

      if (themeVariant === "dark" || themeVariant === "hacker") {
        mermaid.initialize({ theme: 'dark' });
      } else {
        mermaid.initialize({ theme: 'default' });
      }
      
      var mermaids = [];
      [].push.apply(mermaids, document.getElementsByClassName('language-mermaid'));
      mermaids.forEach(function(elem) {
        var elemParentNode = elem.parentNode;

        if (elemParentNode !== document.body) {
          elemParentNode.parentNode.insertBefore(elem, elemParentNode);
          elemParentNode.parentNode.removeChild(elemParentNode);
        }

        var newElemWrapper = document.createElement('div');
        newElemWrapper.classList.add('mermaid');
        newElemWrapper.style.padding = '34px 4px 6px';
        newElemWrapper.innerHTML = elem.innerHTML;
        elem.replaceWith(newElemWrapper);
      });
    }
    
    

    
    if (lib && lib.includes('katex')) {
      var mathElements = document.getElementsByClassName('math');
      var options = {
        delimiters: [
          { left: "$$", right: "$$", display: true },
          { left: "\\[", right: "\\]", display: true },
          { left: "$", right: "$", display: false },
          { left: "\\(", right: "\\)", display: false }
        ],
      };

      renderMathInElement(document.querySelector('.single__contents'), options);
    }
    


    
    if (lib && lib.includes('flowchartjs')) {
      
      var options = JSON.parse("{\"arrow-end\":\"block\",\"element-color\":\"black\",\"fill\":\"white\",\"flowstate\":{\"approved\":{\"fill\":\"#58C4A3\",\"font-size\":12,\"no-text\":\"n/a\",\"yes-text\":\"APPROVED\"},\"current\":{\"fill\":\"yellow\",\"font-color\":\"red\",\"font-weight\":\"bold\"},\"future\":{\"fill\":\"#FFFF99\"},\"invalid\":{\"fill\":\"#444444\"},\"past\":{\"fill\":\"#CCCCCC\",\"font-size\":12},\"rejected\":{\"fill\":\"#C45879\",\"font-size\":12,\"no-text\":\"REJECTED\",\"yes-text\":\"n/a\"},\"request\":{\"fill\":\"blue\"}},\"font-color\":\"black\",\"font-size\":14,\"line-color\":\"black\",\"line-length\":50,\"line-width\":3,\"no-text\":\"no\",\"scale\":1,\"symbols\":{\"end\":{\"class\":\"end-element\"},\"start\":{\"element-color\":\"green\",\"fill\":\"yellow\",\"font-color\":\"red\"}},\"text-margin\":10,\"x\":0,\"y\":0,\"yes-text\":\"yes\"}");
      var jsonContent = null;

      var flowchartPrefix = "language-flowchart";
      var index = 0;
      Array.prototype.forEach.call(document.querySelectorAll("[class^=" + flowchartPrefix + "]"), function(x){
          x.style.display = 'none'
          x.parentNode.style.backgroundColor = "transparent"
          jsonContent = x.innerText;

          var node0 = document.createElement('div');
          node0.id = 'flowchart' + index;
          x.parentNode.insertBefore(node0, x);

          var diagram = flowchart.parse(jsonContent);
          diagram.drawSVG("flowchart"+index, options);

          index +=1;
      });      
    }
    


    
    document.querySelectorAll("mjx-container").forEach(function (x) {
      x.parentElement.classList += 'has-jax'
    });
    


    
    if (lib && lib.includes('msc')) {
      
      var options = JSON.parse("{\"theme\":\"hand\"}");
      var jsonContent = null;

      var index = 0;
      var chartPrefix = "language-msc";
      Array.prototype.forEach.call(document.querySelectorAll("[class^=" + chartPrefix + "]"), function (x) {
        x.style.display = 'none'
        x.parentNode.style.backgroundColor = "transparent"
        jsonContent = x.innerText;
        var node0 = document.createElement('div');
        node0.id = 'msc' + index;
        x.parentNode.insertBefore(node0, x);
        var diagram = Diagram.parse(jsonContent);
        diagram.drawSVG("msc" + index, options);
        index += 1;
      });
    }
    


    
    if (lib && lib.includes('chart')) {
      var borderColor = "#666";
      var bgColor = "#ddd";
      var borderWidth = 2;

      Chart.defaults.global.elements.rectangle.borderWidth = borderWidth;
      Chart.defaults.global.elements.rectangle.borderColor = borderColor;
      Chart.defaults.global.elements.rectangle.backgroundColor = bgColor;

      Chart.defaults.global.elements.line.borderWidth = borderWidth;
      Chart.defaults.global.elements.line.borderColor = borderColor;
      Chart.defaults.global.elements.line.backgroundColor = bgColor;

      Chart.defaults.global.elements.point.borderWidth = borderWidth;
      Chart.defaults.global.elements.point.borderColor = borderColor;
      Chart.defaults.global.elements.point.backgroundColor = bgColor;

      var chartPrefix = "language-chart";
      var index = 0;
      var jsonContent = null;

      Array.prototype.forEach.call(document.querySelectorAll("[class^=" + chartPrefix + "]"), function (x) {
        x.style.display = 'none'
        x.parentNode.style.backgroundColor = "transparent"
        jsonContent = x.innerText;
        var node0 = document.createElement('canvas');
        var source = null;
        node0.height = 200;
        node0.style.height = 200;
        node0.id = 'myChart' + index;
        source = JSON.parse(jsonContent);
        x.parentNode.insertBefore(node0, x);
        var ctx = document.getElementById('myChart' + index).getContext('2d');
        var myChart = new Chart(ctx, source);
        index += 1;
      });            
    }
    


    
    if (lib && lib.includes('wavedrom')) {
      var wavePrefix = "language-wave";
      var index = 0;
      var jsonContent = null;
      
      Array.prototype.forEach.call(document.querySelectorAll("[class^=" + wavePrefix + "]"), function (x) {
        x.style.display = 'none'
        x.parentNode.style.backgroundColor = "transparent"
        jsonContent = x.innerText;
        var node0 = document.createElement('div');
        var source = null;
        node0.id = 'WaveDrom_Display_' + index;
        source = JSON.parse(jsonContent);
        x.parentNode.insertBefore(node0, x);
        WaveDrom.RenderWaveForm(index, source, "WaveDrom_Display_");
        index += 1;
      });
    }
    


    
    if (lib && lib.includes('viz')) {
      var vizPrefix = "language-viz-";
      Array.prototype.forEach.call(document.querySelectorAll("[class^=" + vizPrefix + "]"), function (x) {
        x.style.display = 'none'
        x.parentNode.style.backgroundColor = "transparent"
        var engine;
        x.getAttribute("class").split(" ").forEach(function (cls) {
          if (cls.startsWith(vizPrefix)) {
            engine = cls.substr(vizPrefix.length);
          }
        });
        var viz = new Viz();
        viz.renderSVGElement(x.innerText, { engine: engine })
          .then(function (element) {
            element.style.width = "100%";
            x.parentNode.insertBefore(element, x);
          })
      });
    }
    
    
  }
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